Treasure Chest

Each Booster Pack a player opens contains one Treasure Chest of a random rarity (common, uncommon, rare or legendary). These special chests contain a number of random items. Primal Packs always contain a Legendary treasure chest.

The rarity of a treasure chest can be upgraded using the Wheels of Fate. One of the possible results of the Wheel of Fate is a treasure chest rarity upgrade, which increases the rarity of the chest by one (a common chest becomes uncommon, an uncommon one becomes rare and so on). When you upgrade a legendary treasure chest if becomes a primal chest. The only way to get a primal chest is via this upgrading method.

Confirmed list of possible contents:
 * Booster Pack
 * Artifacts (Common to Legendary)
 * PVE Cards
 * PVP Cards
 * Sleeves
 * Equipment
 * Mercenaries
 * Alternate Art Cards